Câu 2: Câu 3:
568 - { 5[143-(4-1)^2]+10 } :10 107 - {38+7.3^2 - 24: 6+(9 - 7)^3]}:15
= 568 - {5[143-3^2]+10}:10 = 107 - {38+7.9 - 4 + 2^3]}:15
= 568 - {5[143-9]+10}:10 = 107-{38+63-4+8]}:15
= 568 - {5.134+10}:10 =107- 105:15
= 568 - {670+10}:10 = 107 - 7
= 568 - 680:10 = 100
= 568 -68
=500